US3601851A - Annular nozzle for an extruder - Google Patents
Annular nozzle for an extruder Download PDFInfo
- Publication number
- US3601851A US3601851A US10442A US3601851DA US3601851A US 3601851 A US3601851 A US 3601851A US 10442 A US10442 A US 10442A US 3601851D A US3601851D A US 3601851DA US 3601851 A US3601851 A US 3601851A
- Authority
- US
- United States
- Prior art keywords
- lever
- nozzle
- core
- longitudinal axis
- annular
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
- B29C48/325—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles being adjustable, i.e. having adjustable exit sections
- B29C48/327—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles being adjustable, i.e. having adjustable exit sections with centering means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
Definitions
- An extruder nozzle has a core swivelly mounted within the passage of the nozzle body so as to define an annular space at the discharge opening of the nozzle.
- An adjusting lever extends laterally from the swivel point of the core with the axis of the lever passing through the swivel point and being perpendicular to the longitudinal axis of the nozzle.
- An arrangement of levers and adjustable eccentrics are connected to the adjusting lever on the exterior of the nozzle to permit swiveling of the nozzle core to vary the cross section of the annular discharge opening.
- the present invention relates to a nozzle for a plastics extruder, more particularly, to a nozzle having an annular openin g whose cross section can be adjusted.
- Annular nozzles to which the present invention relates have been used in blow-molding apparatus for forming of hollow bodies from thermoplastic material. Under certain circumstances it is desirable to vary the cross section distribution of plastic material through the annular discharge opening of the nozzle.
- the tubular element extruded from the nozzle may be warped or have walls of unequal thickness because of the differential distribution of temperature around the circum ference of the annular opening and the nonuniform pressure distribution resulting from such a temperature distribution.
- the adjustment of the annular discharge opening is generally quite small and usually amounts to only a few one hundredths of a millimeter.
- Another form of adjusting structure for the annular opening of an extruder nozzle comprises mounting the forward or discharge portion of the nozzle body on conical sealing surfaces and providing a spherical connection between this forward portion and the remainder of the nozzle body so that the forward portion can be swiveled about a point located on the longitudinal axis of the nozzle.
- This form of nozzle is also adjusted by means of setscrews which are accessible from a forward position of the nozzle.
- this nozzle not only has the disadvantages of the adjustable nozzle as described above but, has the further disadvantage that when such nozzles are used in a multiple extruder head with the nozzles being closely spaced it is extremely difficult and in many cases almost im possible to manipulate the adjusting screws of one of these nozzles.
- an annular nozzle for an extruder may comprise a nozzle body having a passage therethrough with a discharge opening at one end.
- a - core is mounted within the passage for swivel movement about a point positioned on the longitudinal axis of the nozzle body passage and spaced inwardly from the discharge opening.
- laterally extending adjusting lever is fixed to the core at its swivel point to enable the core to be moveable within the nozzle body to vary the cross section of the annular space of the nozzle discharge opening as defined by the core.
- the longitudinal axis of the adjusting lever passes through the swivel point and is perpendicular to the longitudinal axis of the nozzle.
- Adjusting mechanism is mounted on the exterior of the nozzle body and is operatively connected to the adjusting lever so that the nozzle core can be pivoted in two planes perpendicular to each other and passing through the longitudinal axis of the nozzle.
- FIG. l is a longitudinal sectional view of the annular nozzle according to the present invention taken along the line I-[ of FIG. 2;
- FIG. 2 is a front elevational view of the annular nozzle.
- a nozzle 4 which incorporates the present invention is attached by means of screws 5 to a distributor plate 3 of an extruder which is not shown in the drawings.
- the nozzle comprises a nozzle body 6 having a passage therethrough in which a core 7 is mounted for swivel movement.
- One end of the core is positioned at the discharge opening of the nozzle and defines an annular discharge opening 8.
- the other end of the core is provided with a spherical bearing head 9 mounted for universal movement in a conforming socket formed within the nozzle body.
- An adjusting lever 11 is fixed to the spherical bearing head 9 of the core and extends laterally of the nozzle body so as to be positioned at a right angle with the respect to longitudinal axis 10 of the nozzle.
- the longitudinal axis 12 of the adjusting lever 11 passes through the center, indicated at 13, of the spherical bearing head 9.
- a pair of supporting lugs M are mounted on the distributor plate 3 and a lever 15 is pivotally mounted therebetween by means ofa pin.
- the lower or free end oflever 15 has journaled therein a pin 16 mounted eccentrically on a disc 16 which is rotatably mounted in a lug 17 of the lever 18 which is loosely mounted on the adjusting lever 11.
- An adjustment knob i9 is attached to the eccentric disc 16.
- a second adjusting lever 21 is nonrotatably mounted on the four-sided end 20 of the adjusting lever 11.
- the free end of lever 21 has an eccentric disc 22 rotatably mounted therein with an adjustment knob 24 being attached to the disc 22.
- a pin 22 extends eccentrically from disc 22 and engages within a longitudinal slot 23 formed in the lower end of the lever 18.
- the core 7 may be universally pivoted within the nozzle.
- Rotation of the adjusting knob 19 will cause the eccentric pin 16 to move vertically and thus effectively vary the length between the attachments at the ends of the lever 15.
- manipulation of adjustment knob 19 will cause eccentric pin 16 to move downward which would cause lever lid to move upwardly, thereby moving the adjusting lever llll also upwardly to cause pivoting of the core 7 in a plane defined by the longitudinal axis 10 of the nozzle and the longitudinal axis 12 of the adjusting lever.
- Rotation of the adjusting knob 24 will cause the lever 21 to pivot around the longitudinal axis 12 of adjusting lever Ill. This pivoting will occur since the pin 22' is engaged within the slot23 which remains stationary since the lever ll remains in a vertical position. thus, rotation of adjusting knob 24 will pivot lever 21 and accordingly pivot adjusting lever Ill around its axis 22 to bring about a pivoting movement of the core '7 in a plane perpendicular to the plane mentioned above. This plane will pass through the nozzle axis 10 and will be perpendicular to the longitudinal axis 12 of the adjusting lever II.
- the nozzle 4 further comprises a cylindrical strip heater 25 and a steel jacket 26 for retaining the strip heater in position.
- the thermoplastic material which is to be extruded through the annular space 3 enters the nozzle head through the portion of the nozzle passage indicated at 27.
- a plurality of bores 28 are provided in the spherical bearing head Q to permit the thermoplastic material to pass therethrough through the annular passage 29 to be discharged in tubular form through the annular opening 8.
- the adjustment arranged ac-- cording to the present invention readily permits adjustment of the annular discharge opening because of the spherical connection of the core within the nozzle body.
- the pivot point of the adjustable core is removed as far as possible from the discharge opening of the nozzle which is closely adjacent a danger zone which may include the hot thermoplastic tube which has just been, extruded and cutters which may be used to sever the extruded tube from the nozzle head.
- the adjusting levers are positioned on the most accessible portion of the extruder so as to permit a simple and completely safe adjustment during the extruding operation.
- the adjusting lever 11 may be operated directly by hand when the spherical head is so fitted within the nozzle that a clamping effect is produced which automatically locks the nozzle in position.
- a more accurate and precise adjustment of the nozzle opening can be obtained.
- An annular nozzle for an extruder comprising a nozzle body having a passage therethrough and a discharge opening at one end thereof, a core mounted within said passage, one of said core and nozzle body being mounted for swivel movement about a point on the longitudinal axis of said nozzle body passage and spaced inwardly from the discharge opening, the relative swivel movement between said core and said nozzle body varying the cross section of the annular space defined within the discharge opening by the core, and a laterally extending lever fixed to that one of the core and nozzle body which is swivelly mounted at the swivel point thereof, the longitudinal axis of said lever passing through said swivel point and being perpendicular to the longitudinal axis of the nozzle.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Treatment Of Liquids With Adsorbents In General (AREA)
- Lubricants (AREA)
- Medicinal Preparation (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19691908933 DE1908933B2 (de) | 1969-02-22 | 1969-02-22 | Strangpresskopf zum strangpressen eines schlauches |
Publications (1)
Publication Number | Publication Date |
---|---|
US3601851A true US3601851A (en) | 1971-08-31 |
Family
ID=5726017
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10442A Expired - Lifetime US3601851A (en) | 1969-02-22 | 1970-02-11 | Annular nozzle for an extruder |
Country Status (3)
Country | Link |
---|---|
US (1) | US3601851A (fr) |
DE (1) | DE1908933B2 (fr) |
FR (1) | FR2031597A1 (fr) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4368026A (en) * | 1980-01-18 | 1983-01-11 | Wavin B.V. | Centering device for shaping tools of extrusion presses |
EP0467017A1 (fr) * | 1990-07-18 | 1992-01-22 | Nemoto Project Industry Co., Ltd. | Dispositif pour le formage de portions courbes de tube |
EP0513616A1 (fr) * | 1991-05-13 | 1992-11-19 | PIRELLI CAVI S.p.A. | Tête d'extrusion pour appliquer des revêtements de matériaux polymères à des produits semi-finis à conformation cylindrique allongée |
US20050276876A1 (en) * | 2004-06-09 | 2005-12-15 | Claus-Dieter Koetke | Extrusion head for blow molding |
US20160167278A1 (en) * | 2014-12-11 | 2016-06-16 | Hyundai Motor Company | Variable extrusion die apparatus |
US20190299514A1 (en) * | 2018-03-28 | 2019-10-03 | Raumedic Ag | Die for a hollow profile extruder |
US11865761B2 (en) | 2020-09-28 | 2024-01-09 | Troester Gmbh & Co. Kg | Extrusion head and method for producing an elongated hollow body by means of said extrusion head |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3617652A1 (de) * | 1986-05-26 | 1987-12-03 | Troester Maschf Paul | Extruderanlage zum ummanteln eines strangfoermigen produktes, insbesondere eines kabels |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3111713A (en) * | 1961-01-24 | 1963-11-26 | Kaplan Seymour | Extrusion cross-head for plastic material |
US3221371A (en) * | 1963-03-25 | 1965-12-07 | Stevens Alexander Michael | Extruding dies |
US3327350A (en) * | 1964-09-30 | 1967-06-27 | Sterling Extruder Corp | Apparatus for parison programming |
-
1969
- 1969-02-22 DE DE19691908933 patent/DE1908933B2/de active Pending
-
1970
- 1970-02-11 US US10442A patent/US3601851A/en not_active Expired - Lifetime
- 1970-02-20 FR FR7006207A patent/FR2031597A1/fr not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3111713A (en) * | 1961-01-24 | 1963-11-26 | Kaplan Seymour | Extrusion cross-head for plastic material |
US3221371A (en) * | 1963-03-25 | 1965-12-07 | Stevens Alexander Michael | Extruding dies |
US3327350A (en) * | 1964-09-30 | 1967-06-27 | Sterling Extruder Corp | Apparatus for parison programming |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4368026A (en) * | 1980-01-18 | 1983-01-11 | Wavin B.V. | Centering device for shaping tools of extrusion presses |
EP0467017A1 (fr) * | 1990-07-18 | 1992-01-22 | Nemoto Project Industry Co., Ltd. | Dispositif pour le formage de portions courbes de tube |
US5156862A (en) * | 1990-07-18 | 1992-10-20 | Nemoto Project Industry Co., Ltd. | Apparatus for forming bent portion of pipe in apparatus for making bent pipe |
EP0513616A1 (fr) * | 1991-05-13 | 1992-11-19 | PIRELLI CAVI S.p.A. | Tête d'extrusion pour appliquer des revêtements de matériaux polymères à des produits semi-finis à conformation cylindrique allongée |
US5286183A (en) * | 1991-05-13 | 1994-02-15 | Pirelli Cavi S.P.A. | Extruder head for applying coatings of polymeric material to semifinished products of elongated cylindrical conformation |
US20050276876A1 (en) * | 2004-06-09 | 2005-12-15 | Claus-Dieter Koetke | Extrusion head for blow molding |
EP1604801A3 (fr) * | 2004-06-09 | 2006-04-19 | THERMO-TECHNIK-SYSTEME GmbH | Tête de soufflage pour extrusion |
US7278844B2 (en) | 2004-06-09 | 2007-10-09 | Thermo-Technik-Systeme Gmbh | Extrusion head for blow molding |
US20160167278A1 (en) * | 2014-12-11 | 2016-06-16 | Hyundai Motor Company | Variable extrusion die apparatus |
CN106180243A (zh) * | 2014-12-11 | 2016-12-07 | 现代自动车株式会社 | 可变挤压模具装置 |
US9744709B2 (en) * | 2014-12-11 | 2017-08-29 | Hyundai Motor Company | Variable extrusion die apparatus |
CN106180243B (zh) * | 2014-12-11 | 2019-08-09 | 现代自动车株式会社 | 可变挤压模具装置 |
US20190299514A1 (en) * | 2018-03-28 | 2019-10-03 | Raumedic Ag | Die for a hollow profile extruder |
US11865761B2 (en) | 2020-09-28 | 2024-01-09 | Troester Gmbh & Co. Kg | Extrusion head and method for producing an elongated hollow body by means of said extrusion head |
Also Published As
Publication number | Publication date |
---|---|
FR2031597A1 (fr) | 1970-11-20 |
DE1908933A1 (de) | 1970-11-12 |
DE1908933B2 (de) | 1971-04-29 |
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